How to add bump to shader?
Per shader:
Plug it it into the Height input of a Bump node (ShiftA&gt;Add node &gt; Vector &gt; Bump)

The above node setup will only bump the diffuse part of the shader, simulating a bumpy diffuse surface coated with a smooth glossy &quot;glaze&quot; layer.

Entire material:
If you want to apply the same bump mapping to all the shaders in your material, just plug it into the Displace input of the Material output node:

You'll notice that now the bump is applied to the glossy shader too: